/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/**
 *@filename: pageInfo.cc
 */
#include<allocator.h>
#include<os.h>
#include<read-config.h>

void PageInfo::setPageAsUsed(size_t offset)
{
    /// set the flag
    isUsed_       = 1;
    ///
    hasFreeSpace_ = 1;
    /// the nextPage_ ptr is pointing NULL
    nextPage_ = NULL;
    if (PAGE_SIZE > offset)
        nextPageAfterMerge_ = NULL;
    else  ///       (char*) PageInfo + offset
          ///                                 |
          ///                                 |<-  nextPageAfterMerge_
        nextPageAfterMerge_ = ((char*)this)+ offset;
}
void PageInfo::setFirstPageAsUsed()
{
    isUsed_             = 1;
    hasFreeSpace_       = 1;
    nextPageAfterMerge_ = NULL;
    nextPage_           = NULL;
}
